Project: coastDat-3 - CoastDat-3 (https://www.coastdat.de/about_us/) comprises a compilation of consistent hindcasts obtained from numerical models. The atmospheric part of the dataset is simulated by using the COSMO in CLimate Mode version 5 (http://www.clm-community.eu) with different boundary conditions. The objective is to provide a consistent meteo-marine data set. Summary: This is a hydrodynamic hindcast for the North Sea and the Northeast Atlantic over the period 1948-2022 and ongoing. Atmospheric forcing is the regional COSMO-CLM NCEP1 data. The simulation has been performed with the hydrodynamic model TRIM-NP V2.5 in barotropic 2D mode. FES tides are included. Water level and current component fields are stored hourly. The model is set up on an equidistant Cartesian grid cascade with the center near Helgoland (7.88 E, 54.18 N). The coarsest grid with 12.8 km resolution covers the area from 20 W to 30 E and from 42 N to 65 N. Further nested grids better resolve the North Sea (with 6.4km), southern North Sea (with 3.2km) and the German Bight (with 1.6km and 0.4km). Hourly model data from grid 1 (ssh) and grid 4 (ssh, u-current, v-current) are available in this data bank. For data from other grids or 20min temporal resolution please contact the authors.